diff --git a/chameleonic.p8 b/chameleonic.p8
index edc351d..3d3066c 100644
--- a/chameleonic.p8
+++ b/chameleonic.p8
@@ -93,8 +93,7 @@ function _apply(x,ts,a)
 end
 
 function sgn0(x)
- if (x==0) return x
- return sgn(x)
+ return x!=0 and sgn(x) or 0
 end
 
 function _mnmx(x,y)